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A comparison of the population genetic structure of parasitic Viscum album from two landscapes differing in degree of fragmentation

(2009) PLANT SYSTEMATICS AND EVOLUTION. 281(1-4). p.161-169
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Organization
Abstract
Parasite populations do not necessarily conform to expected patterns of genetic diversity and structure. Parasitic plants may be more vulnerable to the negative consequences of landscape fragmentation because of their specialized life history strategies and dependence on host plants, which are themselves susceptible to genetic erosion and reduced fitness following habitat change. We used AFLP genetic markers to investigate the effects of habitat fragmentation on genetic diversity and structure within and among populations of hemiparasitic Viscum album. Comparing populations from two landscapes differing in the amount of forest fragmentation allowed us to directly quantify habitat fragmentation effects. Populations from both landscapes exhibited significant isolation-by-distance and sex ratios biased towards females. The less severely fragmented landscape had larger and less isolated populations, resulting in lower levels of population genetic structure (F(ST) = 0.05 vs. 0.09) and inbreeding (F(IS) = 0.13 vs. 0.27). Genetic differentiation between host-tree subpopulations was also higher in the more fragmented landscape. We found no significant differences in within-population gene diversity, percentage of polymorphic loci, or molecular variance between the two regions, nor did we find relationships between genetic diversity measures and germination success. Our results indicate that increasing habitat fragmentation negatively affects population genetic structure and levels of inbreeding in V. album, with the degree of isolation among populations exerting a stronger influence than forest patch size.
Keywords
HOST, PLANT, AFLP MARKERS, REMNANT POPULATIONS, PRIMULA-ELATIOR, Gene flow, SIZE, DIVERSITY, MISTLETOE, HABITAT FRAGMENTATION, Bird dispersal, ARCEUTHOBIUM-AMERICANUM VISCACEAE, Habitat fragmentation, Genetic differentiation, AFLP, Mistletoe

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Chicago
Stanton, Sharon, Olivier Honnay, Hans Jacquemyn, and Isabel Roldàn-Ruiz. 2009. “A Comparison of the Population Genetic Structure of Parasitic Viscum Album from Two Landscapes Differing in Degree of Fragmentation.” Plant Systematics and Evolution 281 (1-4): 161–169.
APA
Stanton, S., Honnay, O., Jacquemyn, H., & Roldàn-Ruiz, I. (2009). A comparison of the population genetic structure of parasitic Viscum album from two landscapes differing in degree of fragmentation. PLANT SYSTEMATICS AND EVOLUTION, 281(1-4), 161–169.
Vancouver
1.
Stanton S, Honnay O, Jacquemyn H, Roldàn-Ruiz I. A comparison of the population genetic structure of parasitic Viscum album from two landscapes differing in degree of fragmentation. PLANT SYSTEMATICS AND EVOLUTION. 2009;281(1-4):161–9.
MLA
Stanton, Sharon, Olivier Honnay, Hans Jacquemyn, et al. “A Comparison of the Population Genetic Structure of Parasitic Viscum Album from Two Landscapes Differing in Degree of Fragmentation.” PLANT SYSTEMATICS AND EVOLUTION 281.1-4 (2009): 161–169. Print.
@article{8096316,
  abstract     = {Parasite populations do not necessarily conform to expected patterns of genetic diversity and structure. Parasitic plants may be more vulnerable to the negative consequences of landscape fragmentation because of their specialized life history strategies and dependence on host plants, which are themselves susceptible to genetic erosion and reduced fitness following habitat change. We used AFLP genetic markers to investigate the effects of habitat fragmentation on genetic diversity and structure within and among populations of hemiparasitic Viscum album. Comparing populations from two landscapes differing in the amount of forest fragmentation allowed us to directly quantify habitat fragmentation effects. Populations from both landscapes exhibited significant isolation-by-distance and sex ratios biased towards females. The less severely fragmented landscape had larger and less isolated populations, resulting in lower levels of population genetic structure (F(ST) = 0.05 vs. 0.09) and inbreeding (F(IS) = 0.13 vs. 0.27). Genetic differentiation between host-tree subpopulations was also higher in the more fragmented landscape. We found no significant differences in within-population gene diversity, percentage of polymorphic loci, or molecular variance between the two regions, nor did we find relationships between genetic diversity measures and germination success. Our results indicate that increasing habitat fragmentation negatively affects population genetic structure and levels of inbreeding in V. album, with the degree of isolation among populations exerting a stronger influence than forest patch size.},
  author       = {Stanton, Sharon and Honnay, Olivier and Jacquemyn, Hans and Rold{\`a}n-Ruiz, Isabel},
  issn         = {0378-2697},
  journal      = {PLANT SYSTEMATICS AND EVOLUTION},
  keyword      = {HOST,PLANT,AFLP MARKERS,REMNANT POPULATIONS,PRIMULA-ELATIOR,Gene flow,SIZE,DIVERSITY,MISTLETOE,HABITAT FRAGMENTATION,Bird dispersal,ARCEUTHOBIUM-AMERICANUM VISCACEAE,Habitat fragmentation,Genetic differentiation,AFLP,Mistletoe},
  language     = {eng},
  number       = {1-4},
  pages        = {161--169},
  title        = {A comparison of the population genetic structure of parasitic Viscum album from two landscapes differing in degree of fragmentation},
  url          = {http://dx.doi.org/10.1007/s00606-009-0198-0},
  volume       = {281},
  year         = {2009},
}

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